It begins
You're on your way to bed when a sound draws your attention, just a few steps away your daughters door is partially open and there are soft whimpers coming from inside. She's been having bad dreams lately so you quietly move the few steps to peek in and make sure everything is all right. That's when the scent hits your nose, arousal! But you're already peeking around the door frame.
There on her bed is your thirteen year old daughter, the covers thrown back and her nightie pulled up to expose all of her body from her neck down. Her arms are pressed tightly to her sides lifting the small breasts that you've noticed from time to time but haven't paid that much attention to, after all she's your daughter. Her hands are pressed between her thighs, the left spread out to hold her labia parted which gives you the most intimate view of her you've had since you stopped changing her diapers when she was nearly two. Her right hand... Oh good lord she's running her fingers over her clit working herself in personal pleasure!
You know you should step away from the door and leave her be, but something holds you there. It's an intoxicating sight, watching this young girl that you've raised since she was a baby striving for a more adult pleasure. Her fingers slide around and around that little bud at the apex of her slit, coaxing those little moans and whimpers from her throat. You swallow hard and rest a hand on the door frame as the scent of aroused woman hits you stronger, it's been a while since you and your wife had anything like a normal sex life, she's been unable to sleep and the doctor prescribed sleeping pills that send her so far into sleep it's like lying beside a lump of clay. Not even your most ardent advances will wake her from this slumber and when you're awake there is always something in the way.
Your little girls hips lift and her fingers dive into the lower part of her sex, disappearing from sight as she plunges them into herself. She moans deeply, then withdraws her slick fingers to return to the apex of her slit where she goes back to circling and toying with the little bundle of nerves. It sends a fresh wave of horny woman scent toward you making your mouth fall open as you feel your body responding to the aroma and the sight. Her fingers are working furiously; you can see the sheen of sweat that's coating her, the tautness of those tender young nipples, the way her slit closes and opens again like she's trying to grip something that isn't there.
You know you should walk away, but something stronger than that moral imperative holds you frozen, your eyes roaming over that nubile young body as it gets ever closer to the ultimate goal of any self pleasure. Her hips are lifting off the bed now in a familiar rhythm, lifting as her young body tightens and closes on nothing only to fall down as her petals loosen again letting you see how open she is. Again and again she arches up her legs straining to find purchase on the bed as her body bucks under the pleasure she's feeling.
Just when you think you can't take it anymore she lets out a soft cry, her body lifting up higher off the bed as she tenses. Then something you don't expect happens, a gush of fluid is forced from her shooting nearly to her knees and wetting her thighs and the sheet under her. The scent soon follows a light almost floral scent that is laden with that arousal and pheromones. Her fingers slow and she sinks back to the bed panting harshly as her body tries to recover from the explosive force of her orgasm.
Silently you close the door, resting your head on the solid wood and staring down at your cock, it's harder then you have felt since you were in your own teens and just experiencing sex for the first time. A few minutes pass while your cock throbs in your pants and you try to figure out what the hell you are going to do about it. You've just watched your barely teenage daughter get herself off and instead of being ashamed of yourself, you're hard enough that you think you could bust through concrete with your cock alone.
Swallowing hard you force yourself to turn and walk to your bedroom. You're wife is already asleep, curled on her side facing away from where you will sleep. Carefully you undress, trying to push thoughts of what you've just seen out of your mind but they keep resurfacing over and over, the way her body strained to hold something has your cock throbbing and dripping pre like a fire hose. It's too much you can't stop yourself, sitting on the edge of the bed you reach down and grab your hard cock, stroking slowly at first but you're so worked up it doesn't take more then a few moments for you to move into a faster pace. You can feel your balls drawing up, the tightening of your sac and can't help but wondering what would it feel like slide this heavy hot tool into that small body. God what would it feel like to be clasped inside that bucking heaving form as she cums? To feel your hips driving forward shoving you hard and fast into that untouched pussy. To experience the sensation of those hard little nipples dragging against your chest as you drove that body to the ultimate in pleasure? The idea is too much and it sends you over the edge shooting a heavy load of your cum across the floor. Your hand keeps stroking for a few moments drawing out the last of your load and smearing it all down the length.
Your wife makes a soft sound behind you and it suddenly hits you that you've just jerked off thinking about your own daughter! How could you do that! With shaking hands you use your discarded underwear to clean up the mess you've made of yourself and the floor, tossing the soiled garment into the clothes basket. Naked you crawl under your blankets and try to sleep, but it's elusive, images of that young body writhing on her bed keep haunting you, making your cock pulse in its half aroused state for most of the night.